We can likely blame China for the slow buildup. Last year Blizzard and its partners were plagued with problems in the country. The game was down for an extended period of time when Blizzard swapped operators from The9 to NetEase.

Now everything is operating at peak efficiency once more, and Blizzard can go back to tallying those numbers.

"The support and enthusiasm that gamers across the world continue to show for World of Warcraft reaffirms our belief that it offers one of the best entertainment values available today," said Mike Morhaime, CEO and cofounder of Blizzard Entertainment. "We are as committed as ever to taking the game to new heights, and we look forward to demonstrating that with Cataclysm in December."

For those curious, here is how World of Warcraft counts paying subscribers:

World of Warcraft subscribers include individuals who have paid a subscription fee or have an active prepaid card to play World of Warcraft, as well as those who have purchased the game and are within their free month of access. Internet Game Room players who have accessed the game over the last thirty days are also counted as subscribers. The above definition excludes all players under free promotional subscriptions, expired or cancelled subscriptions, and expired prepaid cards. Subscribers in licensees' territories are defined along the same rules.

That definition has remained in place since the 11.5 million count in 2008.

So what happens next? With the release of the World of Warcraft: Cataclysm expansion right around the corner completely revamping the old world, I'd say Blizzard is in for a sharp jump in subscriber numbers come December.